Driving mechanism.



M. G. DELANEY 6: H. D. SELBY.

` DRIVING MEGHANISM. nrmon'xon FILED JAN. 27. 1911.

Patented Dec. 5, 1911 2 SHEETS-SHEET 1y Patented Dec..5, 1911.

UNITED STATES PATENT OFFICE.

MICHAEL G. DELANEY AND HOWARD D. SELBY, OF DETROIT, MICHIGAN, ASSIGNOR i OF ONE-FIFTH TO HENRY M. BUTZEL, 0F DETROIT, MICHIGAN.

DRIViNG MECHANISM.

Specification of Letters Patent.

Patented Dec'. 5,1911.

App1ication filed January 27", 1911. Serial No. 604,978.

Nici' and llowano I). Sinni', citizens of the United States of America, residing at Detroit. in the county of Vayne and State of ivlichigaii, have invented certain new and useful improvements in Driving Mechanism, of which the following is a specitieation, reference being had' therein to the ac.- conipanying drawings.

This invention relatesto improveinentsin variable` speed power transmitting nieehanisiiis, and more particularly to such mechanism especially adapted for 'driving sewing ii'iachiiies'and other light machinery.

The object of the invention is to provide simple and etlicieiit mechanism yfor trans.- inittii'ig from a shaft driven at a constantv speed, motion at a speed which may be varied through wide ranges and which mecha nisni may be easily operated to vary the speed or stop the transmission of motion.

A, further object is to provide certain lother new and useful features in the construction vand ai'i'angeiiient of parts, all as hereinafter more fully described reference heilig 'had to the,accompanying drawings in which,

Figure 1 is a front ele 'ation'of a mechanism en'ibodyiiig the invention showing the saine` operatively.connected to a. sewing m'achine. Fig. 2 is an end elevation oftthe same with parts broken away and in Section to show the construction; Fig. 3 is an eI ilarged sectional front. elevation of the -variable speed mechanism; and l? ig. 4., is an end elevation of the same. y

iIn factories whe-re numbers of sewing inachines are. used, several sewing machine heads, such vas that indicated aty 1. in the drawings, are mounted upon a table Qand fatthe rear of the table near the floor is a 4"horizontal line shaft 3 driven in any snitable manner to vfurnish power to drivethe machines. Secured upon the line shaft is a friction disk 4 having a contact face at one Side which is dished or curved radially outward from an axial recess oi chamber 5 in said side, and mounted upon the shaft. at Jthat side of the disk is a bearing tube G upon which is a sleeve 7 adapted to slide longitudinally on the tube toward and from said l disk. Within the, recess 5 of the'disk upon theend of the bearing tube is atixed brake disk 8 held frointnrning by rods 9 engaging screw-threaded openings inthe disk and passing" through bearing ears 10 on -the sleeve i', their opposite ends being secured to .a collar 11 on the other end of the bearing tube which is prevented from longitudinal nioveineiit on the lshaft bj a collar 12 fixed on the shaft by a set screw, with a thrust bearing 13 interposed between said collars.

Pi'votall'v attached to the sleeve T at its lower end by pivot bolts 14, is an open fraine 15 having bearings in its upper and lower ends for a short shaft 16 upon which. is secured a conical roll '17 adapted to be e11- gaged with the contact face of the disk 4 by swinging the frame upon its pivots by means of a lever or bar 1S bolted to one side ofthe frame and extending upward there from. Mounted in bearing brackets extending downward from the lower side of the table is a shaft 19 which is slidable loiigitudinally in its bearings. and theupper end of the lever 1S is pivotally attachedto said shaft in anv convenient.manner to swing the fr ame 15 on its'pivets 14 when the shaft 19- is shifted. rius Q0 on the shaft 19 extend downward therefrom to embrace the operators knee so that he ma)7 easilyrand conf vextending arms, to thefree ends of which coiled springs 23 are attached at their upper ends the lower endsof said sJrinOs bein@ 7 C D adjustably. atta/chedut-o a` downwardly eX- ytending brzcket on' the sleeve 7. The

springs thus exert a force to move the sleeve longitudinally, op the tube G toward the disk l and thus the lower end of the roll is moved toward the disk also. The swinging of the upper end of the roll towardthe disk'is resisted by the springs 23 owing to the contact of the straight side of the roll with the. curved surface of the disk, it being necessary in order to bring the upper end of the roll into contact with the margin of the disk, to inove the sleeve upon which the roll is pivotally supported, away from the disk, andto assist the operator in so swinging the roll against the action of said springs, a countery spring 24 is adjnstably attached at one end to an arm'on` the bracket 21` and at its opposite end to the downwardly extending arms of 'bell crank levers 25 pivotally attached to lugs on said bracket with their 4/upwardlyy extending arms connected by ink's 26 to the framey 15 near'tlie upper end thereof. The upper end of the short shaft 16 upon which the. roll is mounted, is cnnected Aby a universal joint127 to a trans'- mission shaft 28 and the upper'end of said shaft 28` is connected by a like-joint with a short shaft 29 mounted in a' gear-casing 30. I Said casing is provided with abearingl at 'one side for 4the projecting end of the driv` upper end of the roll toward the disk, said roll rocks uponits point of contact with the disk,'"wliich pointhanges as the roll is tilted and, thus the speed with which the roll.. will bet driven is increased as saidv point'of' contact"nears the margin of the disk. When the roll is tilted in'the opposite direction, its speed is,decreased as the point of contact moves inward on the disk and if tilted "-.rods engaged-with .the sleeve. ,7 which in turii is heldfrom rotation by 4the lever .18. IfipictionaJl resistanceis, tliiis 'put upon the roll to quickly stop its rotation andthe suHiciently, Vsaid roll will be vmoved out of contact with the disk and its lowerfend will be brought into engagement with the brake disk 81h which is held from turning by the roll-is' swung out of contact with the: drivingffrictioii disk which 'is secured to-and fia Withthe finain shaft 3.

and arrangement of *parts 'may be made witiiciindepar'tiiig from the spirit of our ,in vention Ya-'iid lwe do not .vish to' limit ourselves to tl'ie particular arrangement of parts shown.

what we claim is:

friction disk, a roll arranged with its axis of rotation extending radially of lsaid disk, the` roll' and disk each having a Contact surface and one of said surfaces being curved ral dially of the disk, meaiisfor pivotally su porting the roll at one end adjacent to tie axis of the disk to tilt in a direction longitudinali. ,of its laxis of rotation and' means for holdin 4the axis 4of the, disk..

2. A driving mechanism comprisingl i .dished friction' disk-having a curved `conactuation of the sewing machine, when saidl Qbvi'ously, ,changes in the constructionA Having thus fully discribed our invention` g the roll' against revolving about l c n vn I jsaid' disk across said surface from near the tableniember supported adjacent to the inner end of said roll, and means for rocking said roll upon'its point of contact with said disk and into engagement with said member.

3. ,A driving, mechanism comprising a frictio'nwdisk having a curved contact surface, a vroll extendingradially of. said disk,

means for guiding andpivotally supportingthe inner end of said roll .at the axis of said A'axis ofthe disk toits periphery, a non-rotadisk to turn thereon and move longitudii nally of the axis of said disk when the roll.

is rocked upon its point of Contact with the curved surface .of the disk, means for rocking saidv roll, and holding the same against rei olving about the axis of the disk to cause tlielroll to be rotated by its contact with the is A driving mechanism comprising a friction disk having a curved .contact sur- -face, a roll extending radially of said disk,

means for pivotally supporting 4the inner end of said roll adjacent tothe axis `of said disk yto turn upon its axisiand swing upon said pivot toward and from said disk, and

-v means fory holding said roll against revolving about the axis ofthe disk.

5. A driving mechanism comprising. a frictiondisk having a curved contact surface, a power shaft upon which said disk is secured to turn therewith, a sleeve on said shaft, a frame pivotally attached at one end to said sleeve, a rollmounted upon said frame to turn thereonand to be moved by' 'the' Swingin of said frame into engagement with said isk, and means for yieldingly moving thev sleeve' toward the disk to hold the roll in yielding contact therewith.

' 6. A vdriving `mechanism comprising la `friction disk having a curved contact surface and an axial recess, a roll extending..

radially of said dis'lnmeans for pivtally supporting and holding the inner end of said roll adjacent to said disk adapted to .1. be swung upon said pivotal support to brin the roll into contact with sai surface, an

a stationary member in said recess of saidl l disk adapted to be engaged by said roll when the same is swung out of contact with i lsaid. disk. i. 1. A driving mechanism comprising a r' 7, A driving mechanism com risinga friction disk having a dished si e formed,

with a curved, contact surface, a. drivin shaft upon which` the disk is mounted an secured," a sleevey on the shaft, a frame piv 1' otally attached at its lower endhto ,Saidy sleeve adjacent to said disk, a roll, mounted on said yframe to turn thereon, a power `transmitting shaft turnedby the roll, means ias Iforturning the frameto bring the roll into contact with the disk, andra spring tomove' ,the sleeve longitudinally on the shaft tolward the disk.

8. In a driving mechanism, the combination of a power shaft, a friction disk fixed on said shaftformed with a.l curved and dished contact surface "and with a. recess at its axis, a sleeve on the shaft movable longitudinally thereof, al non-rotatable disk within the recess of the friction disk, a frame pivotedkat one end to said sleeve and provided with bearings, a short shaft mounted in said bearings, a roll on said short shaft extending radially of the friction disk across 4its curved surface, means for .swinging short shaft.

the frame to engage the roll with the curved surface of the disk and rock thesame upon its point of Contact therewith, a spring to `yieldingly more the sleeve toward the disk, a transmission"shaft, and a universal joint connectingsaid transmission shaft with said 9. In a driving mechanism, the combination of a powershaft, a friction disk on said shaft having a (lished side provided with a curved Contact surface and a recess at its axis around said shaft, a sleeve on said shaft slidable, longitudinally thereon, a

brake disk in said recess adjacent to the end of the sleeve, a collar on the shaft loose thereon at a distance from the other `end of the sleeve, rods engaging guide bearings on the sleeve and secured at their ends to said -brake disk and collar, a collar fixed on the sion shaft, a universal joint connecting said' transmission shaftand said short shaft, and

4a lever secured to said frame for swinging the same upon .its pivot.

In testimony whereof we afin; our signet" tures 1n presence of two witnesses.

MICHAEL s. DELANEY; HOWARD D. sELBY.

lVitnesses OTTO F. BARTHEL, Lnwrs E.- FLANDERS. 

